What are the commonly used elastic sensitive components of pressure gauge?

What are the commonly used elastic sensitive components of pressure gauges?

The most commonly used elastic sensitive components of pressure gauges are the following:

1.Single coil spring tube, also known as C-shaped tube or Bourdon tube, this is the most widely used elastic element for pressure gauge

2. Spiral spring tube, also known as multi-turn spring tube;

3, diaphragm;

4. Membrane box;

5, bellows.